Slice flank steak cross-wise, against the grain, into 1/4 inch thick slices.
In a small bowl, combine soy sauce, 1 tablespoon olive oil, 2 cloves minced garlic and black pepper; Whisk to combine.
Add flank steak slices to marinade and toss to coat; Set aside.
Cut potatoes into quarters.
Heat a large skillet over medium-high heat and add remaining tablespoon of olive oil and 1 tablespoon of butter.
Season potatoes with House Seasoning Blend and add to skillet.
Cook potatoes for 4 minutes, turn and cook for 4-5 more minutes or until tender.
Transfer potatoes to a plate and set aside.
Add remaining 2 tablespoons of butter to the skillet, along with remaining 3 cloves of minced garlic, thyme and Rosemary; stir for 30 seconds.
Add flank steak to the skillet (reserve the marinade).
Cook for 2-3 minutes, turning once.
Add reserved marinade and cooked potatoes.
Cook for 2 more minutes.